Cylinder drain-cock.



Patented Jan. 9, I900. F. M. DENZIG.

CYLINDER DRAIN COCK.

(Applicatmn filed Mav 17. 1899.)

(No Model.)

maoow l Fries.

P TENT FRED M. DENZIG, OF WABASH, INDIANA.

CYLINDER DRAIN-COCK.

SPECIFICATION forming part of Letters Patent No. 641,086, dated January 9, 1900..

Application filed May 17, 1899.

To all whom it may concern:

Be it known that I, FRED M. DENZIG, a citizen of the United States, residing at Wabash, in the county of Wabash and State of Indiana,have invented certain new and useful Improvements in Cylinder Drain-(Jocks; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.-

My invention relates to an improvement in cylinder drain-cocks for use in locomotives; and it consists in the constructions and combinations of parts, as hereinafter described and claimed.

In the accompanying drawings, Figure l is a perspective view of my improved device. Fig. 2 is a vertical section of the same as applied to the cylinder of a locomotive. Fig. 3 is a horizontal section on the line 3 3 in Fig. 2 looking downward, and Fig. 4 is a cross-section on the line 4- 4 of Fig. 2 looking in the direction of the arrow.

a represents a portion of a cylinder into which the top or cap 1) of the cock is screwed. This cap is provided with a passage 25. To the lower end of this cap is screwed the casting 0, provided with two right-angled drainage-passages d and with a hollowed-out cylindrical portion h.

6 represents the valve which normally closes the passages (1 when the cock is not in action. This valve is supported by a stem f, to which is attached a piston g, which works in the cylindrical space h.

i represents a circular nut which closes the end of the part c. It is provided with a short pipe 70, to which is connected the pipe which supplies air or steam for operating the device. A screw-plug Z is arranged opposite the pipe 7r,and said pipe and plug are interchangeable. The nut t' is provided with a passages, and a passage r connects the passage swith the cylindrical portion h.

13 represents a hole running from the cylinder portion h to the atmosphere, so that the piston 9 may slide up and down easily.

m is a valve-stein loosely passing through the nut 2', and on this stem is located a valve n.

0 represents a spring which normally holds in its action.

the valve it open. The complete device may Serial No. 717,185. (No model.)

either project directly from the bottom of the cylinder, or it may be arranged by the side thereof by means of a bent connection, so as to allow more clearance between it and the" rails.

The operation is as follows: When itis desired to drain the cylinder, steam or air is admitted through the pipe 70. This steam or air passes through the passages s and r and lifts the piston g, opening the valve 6. At the same time the pressure under the piston closes the valve n and a free passage is afforded for the condensed steam through the passages 15 and d. When the supply of steam or air is cut off, the spring 0 lifts the valve 17. and the air or steam under the piston slowly leaks out, allowing the valve 6 to fall by its own weight.

The advantages of my invention are obvious. The old-style drainage-cock is operated by a lever, cranks, or cams from the enginecab, the parts weighing about seventy pounds, exclusive of the drainage-cocks, which weigh twelve pounds each. My device weighs only about four pounds, and there is a straight connection from it to the cab by means of an ordinary piece of iron pipe, thus effecting a considerable saving in weight and doing away with all forgings. My device isvery simple All the engineer has to do is simply to turn on and off the steam or air in his cab. 0n turning on the air or steam the valve e is opened, allowing the water in the cylinder to drain out, and on shutting off the air or steam the valve 6 closes slowly by its own weight and the pressure of the steam, if there is any in the cylinder. The valves, stem, and piston are of course provided with suitable packings to keep them steam-tight.

It is obvious that many changes might be made without departing from the spirit of my invention, and I Wish it to be expressly understood that I do not limit myself to the exact form of device shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-- 1. In a cylinder drain-cock, the combination of a casting provided with drain-passages and with a hollowed-out cylindrical portion, a valve adapted to close said drainagepassages, a piston working in said hollowedout cylindrical portion, said valve and piston being connected together, a perforated nut closing the end of said cylindrical portion and the spring-operated valve in said nut, substantially as described.

2. In a cylinder drain-cock, the combination of a casting provided with drainage-passages, a hollowed-out cylindrical portion and a central passage, a valve adapted to close said drainage-passages, a piston in said cylindrical portion, a connection between said valve and piston, a nut closing the end of said cylindrical portion, said nut being provided with passages for the supply and escape of the motor fluid, and a spring-operated valve in said escape-passage, substantially as described.

3. In a cylinder drain-cock, the combination of a perforated cap, a casting adapted to be secured to said cap and provided with drainage-passages and with a hollowed-out cylindrical portion, a valve adapted to close said drainage-passages, a piston Working in said hollowed-out cylindrical portion, said valve and piston being connected together, a perforated nut closing the end of said cylindrical portion, and a spring-operated valve in said nut, substantially as described.

4. In a cylinder drain-cock, the combination of a perforated cap, a casting secured to said cap, provided with drainage-passages, with a hollowed-out cylindrical portion, and With a central passage, a valve adapted to close said drainage-passages, a piston in said cylindrical portion, a connection between said valve and cylinder, a nut closing the end of said cylinder, said nut being provided with passages for the supply and escape of the motor fluid, and a spring-operated valve in said escape passage, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

FRED M. DENZIG.

WVitnesses:

THOMAS L. STITT, ARTHUR S. CHISHOLM. 

